Lindsay Lohan is leading her younger sister Ali Lohan astray, according to a source close to the family.

Lindsay has been spending a lot of time with 15 year old Ali since being dumped by girlfriend Samantha Ronson last month. Lindsay recently revealed that her renewed bond with her sister is the only good thing to have come out of the split - but people close to the family are worried that Lindsay is using Ali as a partying companion.

One source told the New York Post: “There seems to be a lack of parental guidance.

“[Their mum] Dina took Ali out of school and now all she does is hang out with Lindsay - who is back to drinking and partying hard.

“Ali is now wearing really skimpy outfits, and it’s just sad.

“No one is in control. Where are children’s services? Where is Dina?”